Arthur marks



106. COMPOSITIONS, Y eff 3 COATING R PLASTIC. B

UNITED STATES PATENT OFFICE.

ARTHUR MARKS, 0F KNOCK, BELFAST, IRELAND, ASSIGNOR TO HIMSELF AND HABLAND AND WOLFF LIMITED, OF BELFAST, IRELAND.

CONCRETE.

1 309,296. Specification of Letters Patent. Patented J 1y 8, 1919, No Drawing. Application flled January 4, 1919. Serial No. 269,670.

To all whom it may concern using a calcium chlorid solution, hydro- Be it known that I, An'rHUn MARKS, a chloric m or other easily ionized 2101 may subject of the King of Great Britain, reslde use in which cases a filler is used having ing at Knock, Belfast, Ireland, have inventan excess of li 1ne, or lime is added as a filler.

5 ed new and useful Improvements in (L'on- I claim crete, of which the following is a specifica- 1. Concrete consisting of Portland cement, tion. saw dust, a quantity of a solution of sodium 1, This invention relates to li hlt forms of silicate suflicient to render damp the mix- 40 concrete, some of which resem 1e and have ture of Portland cement and saw dust and 10 the properties of wood. such a quantity of a solution of calcium It is found that. light porous aggregatw, chlorid that the mixture contains a slight exsuch as saw dust and cork, W 10 are usec oess of sodium silicate. in making concretes, become water-logged, 2. Concrete consisting of two parts by and, when used in large percentages, preweight of Portland cement, one part by l5 vent the binding of any Portland cement Weight of saw dust, a quantity of a solution used in their manufacture, and in such conof sodium silicate sufficient to render damp cretes cements consisting of magnesiiun the mixture of Portland cement and saw chlorid and calcined magnesia are often dust and such a quantity of a solution of calused to bring about binding, but it is found cium chlorid that the mixture contains a 59 that these have corrosive properties. slight excess of sodium silicate.

According to this invention Portland ce- 3. Concrete consisting of Portland cement, ment an fl%in the proportion 5y saw dust, a quantity of a solution of sodium weig t 0 two par of cement to one part silicate sufiicient to render damp the mixture of wood are mixed together, and the mixof Portland cement and saw dust and such 53 ture is made damp by the addition of a soa quantity of an easily ionized acid that the lution of sodiumsilicate containing one part mixture contains a slight,- excess of sodium by volume of s0 d1um silicate to three parts silicate. of water. The damp mixture is then treated In testimony that I claim the foregoing 60 with a solution of calcium chlorid of a 10% as m y invention, I have signed my name this 53 to 20% strength; 1e amoun 0 calcium 30th day of November, 1918.

chloi'i is such that the mixture contains a slight e cess of sodium silicate. Instead of ARTHUR MARKS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington. D. G. 

